Preparation method of iminodiacetonitrile pelletized product

A technology for iminodiacetonitrile and products is applied in the field of preparation of iminodiacetonitrile granular products, and can solve problems such as affecting the content of main components and physical and chemical properties of the product, decreasing the quality of iminodiacetonitrile, affecting the quality of iminodiacetonitrile, etc. , to achieve the effect of low cost, increased added value and high hardness

Inactive Publication Date: 2009-07-08
CHONGQING UNISPLENDOUR CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because in the high-temperature molten state, iminodiacetonitrile itself will decompose and polymerize rapidly, causing the product to turn black and deteriorate, directly affecting the quality of iminodiacetonitrile, making it difficult to obtain qualified products; and adding a binder for extrusion Molding will bring a certain amount of impurities, which not only affects the main component content and physical and chemical properties of the product, but also reduces the quality of iminodiacetonitrile products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The iminodiacetonitrile powder product after the crystallization is dried, wherein NH(CH 2 EN) 2 The content is 92.6%, the water content is 5.8%, and it is added to the granulator. The spherical extrusion die is installed on the granulator, and the extrusion granulation temperature is controlled at 50°C, the preset particle size is Φ3mm, and the extrusion time is controlled at 1 / 50 Seconds, spherical granular products are obtained by extrusion. The product inspection results are:

[0014] NH(CH 2 EN) 2 : 93.2%

[0015] Moisture: 5.4%

[0016] Hardness: 12N / cm 2

[0017] Particle size: Φ3mm.

Embodiment 2

[0019] The iminodiacetonitrile powder product after the crystallization is dried, wherein NH(CH 2 EN) 2 The content is 94.5%, the water content is 4.3%, and it is added to the granulator, and the cylindrical extrusion die is installed on the granulator, and the extrusion granulation temperature is controlled at 40°C, the preset particle size is Φ4x4mm, and the extrusion time is controlled by 1 / For 40 seconds, a cylindrical granular product is obtained by extrusion. The product inspection results are:

[0020] NH(CH 2 EN) 2 : 94.8%

[0021] Moisture: 4.1%

[0022] Hardness: 10N / cm 2

[0023] Particle size: Φ4x4mm.

Embodiment 3

[0025] The crystallized and dried iminodiacetonitrile powder product, in which NH(CH 2 EN) 2 The content is 95.4%, the water content is 3.4%, and it is added to the granulator. The elliptical extrusion die is installed on the granulator, and the extrusion granulation temperature is controlled at 60 ° C. The preset particle size is Φ3x5mm, and the extrusion time is controlled by 1 / For 30 seconds, an elliptical granule product is obtained by extrusion. The product inspection results are:

[0026] NH(CH 2 EN) 2 : 95.8%

[0027] Moisture: 3.1%

[0028] Hardness: 8N / cm 2

[0029] Particle size: 3x5mm.

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PUM

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Abstract

The invention provides a method for preparing an iminodiacetonitrile granular product, which is characterized in that after being crystallized and dried, the iminodiacetonitrile granular product, at a low temperature, is directly formed into a granular product without any caking agents. The invention is characterized by less investment, simple technique, convenient operation, low cost and the like. The product of the invention also has the advantages of smooth grain, even granularity and high hardness, etc.

Description

technical field [0001] The invention relates to a preparation method of iminodiacetonitrile granular product. Background technique [0002] Iminodiacetonitrile is a light brown to off-white crystalline powder with a melting point of 75-76°C. It is an important fine chemical intermediate and is widely used in pesticides, dyes, medicines, synthetic resins, water treatment, electrical and electronic fields, etc. . The known production method of iminodiacetonitrile is the reaction of hydroxyacetonitrile and ammonia, and the powdery product is obtained after cooling crystallization, centrifugation, drying and other processes. There are many disadvantages in the use of iminodiacetonitrile powder products: (1) it is very easy to cause dust pollution; Large dust pollution; (3) powdery products have poor fluidity, and due to the self characteristics of nitriles, at a certain temperature, iminodiacetonitrile is easy to polymerize and deteriorate and change color, which will directly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J2/20C07C255/61
Inventor 郑伯川郑道敏陈其志韩永松李勇
Owner CHONGQING UNISPLENDOUR CHEM
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